155848861 has 6 divisors (see below), whose sum is σ = 181293630. Its totient is φ = 133584696.

The previous prime is 155848859. The next prime is 155848883. The reversal of 155848861 is 168848551.

It can be written as a sum of positive squares in only one way, i.e., 138791961 + 17056900 = 11781^2 + 4130^2 .

It is not a de Polignac number, because 155848861 - 2¹ = 155848859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155848841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1590246 + ... + 1590343.

It is an arithmetic number, because the mean of its divisors is an integer number (30215605).

Almost surely, 2^155848861 is an apocalyptic number.

It is an amenable number.

155848861 is a deficient number, since it is larger than the sum of its proper divisors (25444769).

155848861 is an equidigital number, since it uses as much as digits as its factorization.

155848861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180603 (or 3180596 counting only the distinct ones).

The product of its digits is 307200, while the sum is 46.

The square root of 155848861 is about 12483.9441283594. The cubic root of 155848861 is about 538.1473560237.

The spelling of 155848861 in words is "one hundred fifty-five million, eight hundred forty-eight thousand, eight hundred sixty-one".